GRAMMAR DETAIL

～ごとに

Structure: A noun for a repeated interval or unit takes ごとに .
Basic usage: この時計は一時間ごとに音が鳴ります。 describes a sound recurring every hour.

every; each time

Follows a quantity or event to show that something repeats at each regular interval or every time the occasion arises.

Examples

バスは十分ごとに来ます。

The bus comes every ten minutes.

この時計は一時間ごとに音が鳴ります。

This clock chimes every hour.

Interval and duration of one occurrence
- 一時間ごとに五分休む means taking a five-minute break at hourly intervals. Distinguish the interval before ごとに from the duration of the action.
Quantity and distribution
- 二人ごとに一枚配る distributes one sheet per group of two people; 一人に二枚ずつ配る gives each person two sheets. The recurring unit differs from the quantity of each share.